采用最小二乘法求解矛盾方程组，可获得误差最小的唯一解。
A technique for sieving the overdetermined system is gived by utilizing least-square method and the unique solution with minimum-error is obtained.
将权矩阵的学习过程归结为用梯度下降法求一组矛盾线性方程组的过程；
Then, the learning of the weight matrix can be done by means of solving a group of systems of linear equations. Last, the mathematical base of the outer-product leaming method is pointed out.
为满足库塔条件而令后缘处涡强度为零，但导致了方程组的矛盾性。
The system becomes overdetermined as zero vortex strength is set at trailing edge, to make the Kutta condition be satisfied.
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